this derivation will be built:
  /nix/store/mhdqkq5kd0b38y5bjwc9a406yqfliaaf-iets-linttest.drv
building '/nix/store/mhdqkq5kd0b38y5bjwc9a406yqfliaaf-iets-linttest.drv'
iets-linttest> ok   absolute-path-in-drv
iets-linttest> ok   absolute-path-literal
iets-linttest> ok   dir-copy-unfiltered